Triaxially strained suspended graphene for large-area pseudo-magnetic fields
Strain-engineered graphene has garnered much attention recently owing to the possibilities of creating substantial energy gaps enabled by pseudo-magnetic fields (PMFs). While theoretical works proposed the possibility of creating large-area PMFs by straining monolayer graphene along three crystallog...
| Main Authors: | , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/161852 |
| _version_ | 1824456390817611776 |
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| author | Luo, Manlin Sun, Hao Qi, Zhipeng Lu, Kunze Chen, Melvina Kang, Dongho Kim, Youngmin Burt, Daniel Yu, Xuechao Wang, Chongwu Kim, Young Duck Wang, Hong Wang, Qi Jie Nam, Donguk |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Luo, Manlin Sun, Hao Qi, Zhipeng Lu, Kunze Chen, Melvina Kang, Dongho Kim, Youngmin Burt, Daniel Yu, Xuechao Wang, Chongwu Kim, Young Duck Wang, Hong Wang, Qi Jie Nam, Donguk |
| author_sort | Luo, Manlin |
| collection | NTU |
| description | Strain-engineered graphene has garnered much attention recently owing to the possibilities of creating substantial energy gaps enabled by pseudo-magnetic fields (PMFs). While theoretical works proposed the possibility of creating large-area PMFs by straining monolayer graphene along three crystallographic directions, clear experimental demonstration of such promising devices remains elusive. Herein, we experimentally demonstrate a triaxially strained suspended graphene structure that has the potential to possess large-scale and quasi-uniform PMFs. Our structure employs uniquely designed metal electrodes that function both as stressors and metal contacts for current injection. Raman characterization and tight-binding simulations suggest the possibility of achieving PMFs over a micrometer-scale area. Current-voltage measurements confirm an efficient current injection into graphene, showing the potential of our devices for a new class of optoelectronic applications. We also theoretically propose a photonic crystal-based laser structure that obtains strongly localized optical fields overlapping with the spatial area under uniform PMFs, thus presenting a practical route toward the realization of graphene lasers. |
| first_indexed | 2025-02-19T03:53:21Z |
| format | Journal Article |
| id | ntu-10356/161852 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:53:21Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1618522022-09-21T07:55:08Z Triaxially strained suspended graphene for large-area pseudo-magnetic fields Luo, Manlin Sun, Hao Qi, Zhipeng Lu, Kunze Chen, Melvina Kang, Dongho Kim, Youngmin Burt, Daniel Yu, Xuechao Wang, Chongwu Kim, Young Duck Wang, Hong Wang, Qi Jie Nam, Donguk School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences Engineering::Electrical and electronic engineering Science::Physics Crystallographic Directions Raman Characterization Strain-engineered graphene has garnered much attention recently owing to the possibilities of creating substantial energy gaps enabled by pseudo-magnetic fields (PMFs). While theoretical works proposed the possibility of creating large-area PMFs by straining monolayer graphene along three crystallographic directions, clear experimental demonstration of such promising devices remains elusive. Herein, we experimentally demonstrate a triaxially strained suspended graphene structure that has the potential to possess large-scale and quasi-uniform PMFs. Our structure employs uniquely designed metal electrodes that function both as stressors and metal contacts for current injection. Raman characterization and tight-binding simulations suggest the possibility of achieving PMFs over a micrometer-scale area. Current-voltage measurements confirm an efficient current injection into graphene, showing the potential of our devices for a new class of optoelectronic applications. We also theoretically propose a photonic crystal-based laser structure that obtains strongly localized optical fields overlapping with the spatial area under uniform PMFs, thus presenting a practical route toward the realization of graphene lasers. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) National Research Foundation (NRF) iGrant of Singapore (A*STAR AME IRG (A2083c0053); National Research Foundation Singapore (Competitive Research Program (NRF-CRP19-2017-01), NRF-ANR Joint Grant (NRF2018-NRF-ANR009 TIGER)); Ministry of Education - Singapore (AcRF TIER (RG 115/21), AcRF TIER 2 (MOE2018-T2-2-011 (S)). 2022-09-21T07:55:08Z 2022-09-21T07:55:08Z 2022 Journal Article Luo, M., Sun, H., Qi, Z., Lu, K., Chen, M., Kang, D., Kim, Y., Burt, D., Yu, X., Wang, C., Kim, Y. D., Wang, H., Wang, Q. J. & Nam, D. (2022). Triaxially strained suspended graphene for large-area pseudo-magnetic fields. Optics Letters, 47(9), 2174-2177. https://dx.doi.org/10.1364/OL.455569 0146-9592 https://hdl.handle.net/10356/161852 10.1364/OL.455569 35486753 2-s2.0-85129021100 9 47 2174 2177 en A2083c0053 NRF-CRP19-2017-01 NRF2018-NRF-ANR009 TIGER RG 115/21 MOE2018-T2-2-011 (S) Optics letters © 2022 Optica Publishing Group. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Science::Physics Crystallographic Directions Raman Characterization Luo, Manlin Sun, Hao Qi, Zhipeng Lu, Kunze Chen, Melvina Kang, Dongho Kim, Youngmin Burt, Daniel Yu, Xuechao Wang, Chongwu Kim, Young Duck Wang, Hong Wang, Qi Jie Nam, Donguk Triaxially strained suspended graphene for large-area pseudo-magnetic fields |
| title | Triaxially strained suspended graphene for large-area pseudo-magnetic fields |
| title_full | Triaxially strained suspended graphene for large-area pseudo-magnetic fields |
| title_fullStr | Triaxially strained suspended graphene for large-area pseudo-magnetic fields |
| title_full_unstemmed | Triaxially strained suspended graphene for large-area pseudo-magnetic fields |
| title_short | Triaxially strained suspended graphene for large-area pseudo-magnetic fields |
| title_sort | triaxially strained suspended graphene for large area pseudo magnetic fields |
| topic | Engineering::Electrical and electronic engineering Science::Physics Crystallographic Directions Raman Characterization |
| url | https://hdl.handle.net/10356/161852 |
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